Artículo de revista
Flow-through photometric sensor for the determination of cadmium at toe nanogram per millilitre level
Fecha
1993Registro en:
Analytical Letters, Volumen 26, Issue 4, 2018, Pages 733-744
1532236X
00032719
10.1080/00032719308017404
Autor
Richter Duk, Pablo
de Castro, M. D.Luque
Valcárcel, Miguel
Institución
Resumen
A sensor for the determination of cadmium based on retention of the Cdl4″ complex on a QAE Sephadex resin located in the flow-cell of a conventional photometric detector and on subsequent complex displacement reaction with 4-(2-pyridylazo)-resorcinol is proposed. Formation of the colored chelate and detection take place simultaneously. The method features a determination range between 30 and 500 ng/ml of Cd(II) with relative standard deviations of 1.8% and 3.4% for 200 and 50 ng/ml of Cd(II), respectively. The selectivity involved in the use of the proposed sensor is shown in the study of interference. © 1993, Taylor & Francis Group, LLC. All rights reserved.